On 12/02/14 11:05, Michael Lipp wrote:
Hi Philip,
More information here:
>
>
https://wiki.gnome.org/Projects/Tracker/Documentation/Examples/SPARQL/Email
Actually, moving from there "back to the top"
(https://wiki.gnome.org/Projects/Tracker/Documentation/) is what gave me
the important information (though at the end): "Original NEPOMUK
ontologies <http://www.semanticdesktop.org/ontologies/>" vs. "Tracker
version of the NEPOMUK ontologies
<http://library.gnome.org/devel/ontology/unstable/>". If I had read that
before, I wouldn't have started this thread about "a mail not being a
document". So Martyn's solution to change the query in tracker-needle
is, of course, the proper solution for the tracker project.
If this change finally reaches my Linux distribution I'll be happy and
everything is well. Nevertheless, I'd like to add an outsider's personal
impression. If it is inappropriate for this mailing list, I apologize.
It should end up in your distro soon.
Though I have learned a bit about the ideas of the "semantic web" as an
approach to "share information between applications" in these last few
days, I doubt that the idea will really take off if the participating
parties cannot agree on a data model for the information to be shared.
I don't think it's lack of agreement. When we designed our ontology we
had a real world use-cases and the spec back then was found wanting and
lacking in a number of places. We added extensions to cater for that.
We really should check and update our ontology where there have been
updates and it makes sense.
Your remark "Our NMO ontology is indeed not the same as Nepomuk. That's
because Nepomuk's is incomplete." leaves me with the strong impress that
some philosophical struggle is going on behind the scenes. The fact that
Not at all.
both parties involved claim exactly the same formal namespace (!)
(@prefix nfo:
<http://www.semanticdesktop.org/ontologies/2007/03/22/nfo#> in
33-nfo.ontology and
xmlns:nfo="http://www.semanticdesktop.org/ontologies/2007/03/22/nfo#"; in
semantic desktop's files) deepens this impression.
From what I have grasped so far, it would probably be a much better
idea to have tracker-needle implementing the search field in gnome-shell
than all those search plugins popping up now. But as a programmer I
wonder whether tracker is firm enough ground and whether I should invest
time in implementing tracker miners for additional items or a
gnome-shell plugin for searching my mails.
There is already a gnome-shell search plugin here:
https://extensions.gnome.org/extension/284/tracker-search/
I helped improve the queries some time back :)
I would say if anything we could use some improvement on the
documentation so people have a better "entry point", we're often
pointing out things that people are unaware of sadly.
Thank you Michael for your work so far. WE would gladly receive further
contributions from you if you're interested! :)
--
Regards,
Martyn
Founder & Director @ Lanedo GmbH.
http://www.linkedin.com/in/martynrussell
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